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A127365 as a simple table

na(n)
00
10
2-1
3-1
42
52
6-3
7-3
84
94
10-5
11-5
126
136
14-7
15-7
168
178
18-9
19-9
2010
2110
22-11
23-11
2412
2512
26-13
27-13
2814
2914
30-15
31-15
3216
3316
34-17
35-17
3618
3718
38-19
39-19
4020
4120
42-21
43-21
4422
4522
46-23
47-23
4824
4924
50-25
51-25
5226
5326
54-27
55-27
5628
5728
58-29
59-29
6030
6130
62-31
63-31

[0,0,-1,-1,2,2,-3,-3,4,4,-5,-5,6,6,-7,-7,8,8,-9,
 -9,10,10,-11,-11,12,12,-13,-13,14,14,-15,-15,16,
 16,-17,-17,18,18,-19,-19,20,20,-21,-21,22,22,-23,
 -23,24,24,-25,-25,26,26,-27,-27,28,28,-29,-29,30,
 30,-31,-31]